Q7 of 25 Page 79

Of the three consecutive natural numbers, five times the smallest number is 9 more than four times the greatest number, find the numbers.

let the numbers be x,x + 1,x + 2 of which being the smallest. According to given conditions 5x = 9 + 4(x + 2)

Expanding


5x = 9 + 4x + 8


Adding - 4x on both sides


x = 17


So, numbers are 17,18,19


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